Liquid crystal display device with transmission and reflective display modes and method of displaying balanced chromaticity image for the same

A method of displaying balanced chromatic image for a liquid crystal display (LCD) device with a transmissive display mode and a reflective display mode, comprising:

• displaying the LCD device in the transmissive mode without a white output signal Wo′;
• and
• displaying the LCD device in the reflective mode with a white output signal Wo′,
• wherein the white output signal Wo′ equals a×Ri+b×Gi+c×Bi, where 0<a<1, 0<b<1, or 0<c<1 respectively.

A liquid crystal display (LCD) device with three primary color sub-pixels and a white sub-pixel, comprising:

• a first substrate and a second substrate disposed opposite each other with a liquid crystal layer interposed therebetween;
• a transparent electrode disposed on the first substrate at each of the three primary color sub-pixels;
• and
• an electrode with a reflective portion disposed on the first substrate at the white sub-pixel.

An LCD module, comprising:

• a liquid crystal display (LCD) device with three primary color sub-pixels and a white sub-pixel;
• and
• a controller coupled to the LCD device to control the LCD device to render an image in accordance with an input,
• wherein the controller comprises a converter converting input signals of Ri, Gi and Bi to output signals of Ro, Go, Bo, Wo, and Wo′ to the LCD device.